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While comments are painful to write, they are essential to ensure code readability The following rules describe how and where to comment Of course, keep in mind that comments are important, but the best code itself should be self - documenting Meaningful type names and variable names are far better than ambiguous names to be interpreted with co ...

The code style and format are indeed quite random, but it is very easy for everyone in a project to follow the same style Individuals may not agree with each of the following format rules, but it is important that the whole project obey a unified programming style. Only in this way can everyone easily read and understand the codeIn addition, we ...

supplement /bin stores commands that can be operated in single user mode /Software / command / script that will not be used when usr/sbin Linux system starts up /Under usr/bin are all executable programs pre installed by the system, and the system upgrade may be overwritten /The usr/local/bin directory is where users can place t ...

10. Database and identity authentication 1. Steps to operate the database in the project Install the third-party module (MySQL) that operates the MySQL databaseConnect to MYSQL database through MYSQL moduleExecute SQL statements through mysql module 2. The code realizes the connection to the database //1. Import mysql module //import mysql ...

1, Mapping from linux physical address to virtual address linux cannot directly operate the physical address. If you need to operate the hardware, you need to convert the physical address into a virtual address first. Because linux enables MMU, you cannot directly operate the physical address. 1. What are the benefits of enabling MMU? (1) Make ...

Today, we welcome the Fourth Lecture of JS. Today, I'll give my family a brief talk on how to obtain the parent and child elements of HTML tags in JS. If you don't understand anything, you can send me a private letter or comment below, and you will reply when you see it. Oh, I also hope the family who have been learning JS with me will continue ...

Today, let's share the article "front-end html analysis - Analysis of dom operation table". The article introduces it in detail according to the example code. It may have a certain reference space and use value for everyone's programming road. Friends in need will learn from Yunnan Qianlong Mark next. 1, To create a table using HTML ...

abstract This paper introduces three writing methods of asynchronous network requests based on XMLHttpRequest, Promise and async/await. async/await allows us to write asynchronous programs in a way similar to synchronization and get rid of cumbersome callback functions. 1, Background In order to meet more and more testing requirements and r ...

Zero. Learning objectives of this lecture Master addition operatorMaster subtraction operatorsMaster multiplication operatorsMaster division operatorMaster self increasing and self decreasing operators 1, Operator overview An operator is a symbol specifically used to tell a program to perform a specific operation or logical operation. An ...

Tip: as a partner of Espressif in Greater China and a partner of sigmastar VAD, we not only carefully sorted out the problems you may encounter in the development process, but also a concise tutorial to get started quickly for the reference of development partners. At the same time, it also carefully sorted out the main characteristics and appl ...